Transformer frame



Dec. 8, 1925. 4 12564.5'12" R. V. BINGAY TRANsFormERv FRAME Filed Dec. 22, 1920 s sheets-sheet 1 @tau @Hammett S y R. V. BNGAY TRANSFORMER FRAME Filed Dec. 22, 1920 s sheets-sheet' 2 Dec. 8,1925. 1,564,512 R. V. BINGAYI TRANSFORMER FRAME Filed De c. 22, 1920 3 Sheets-Sheet 5 WJ MMI www n! i Wl NIH. MM W milf +I mu Patented Dec. 8, 1925.

UNITED STATES amm PATENT oFFlcE. I

ROBERT V. BINGAY, OF PITTSBURGH, PENNSYLVANIA, ASSIGjNOR T0 PITTSBURGH TRANSFORMER COMPANY, A CORPORATION OF'v PENNSYLVANIA.

TRANSFORMER FRAME.

Application lel December 22, 1920. Serial No. 432,388.

To all whom t may concer/n.

Be it known that I, ROBERT V. BINGAY, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Im rovements in Transformer Frames, of whlch the following is a specification.

This invention relates to electrical transformers and particularly to supporting frames for the cores and coils of such transformers. The object of the invention is to provide means for supporting and binding together the laminations of the core without interference with the magnetic circuit, withv out interference with the oil circulation through the coil or coils carried by the core, and in a manner which lends itself conveniently to leading the conductors from the coils, supporting the terminal boards, conductors, or auxiliary devices, and securing the transformer in the tank. A further object of the invention is to provide a frame structure that may be built up to order from standard metal stock'cut to length.

ln the accompanying drawings illustrating the invention,

Fig. 1 is a plan view of a transformer structure embodying the invention,

Figs. 2 and 3 are elevational views of the same, and

Fig. 4 is an elevational view of the llore.

In the specific embodiment of the inven-v tion shown in the drawings a transformer coil C surrounds the middle leg of a core R of the double magnetic circuit type. The middle and outside legs of thel core R are built up of vertical laminas and the upper and lower connecting yokes of the core R are built of horizontal laminae overlapping the vertical laminae at the corners, the laminae of vertical legs and horizontal yokes being clamped together and supported vin the frame F. l

This frame F comprises the vertical corner angle bars 6 drawn toward each other l`ment of the high tension leads. Similarly 100 by the bolts 7 located outside of the laminae,

so that the front and back of the frame may be clamped tightly on the core R. Channels 8 may be assembled between the bolts 7 and the core and serve to hold the several lamina. in place. At thev top ofthe core the bars 9 horizontally extend along the front and back core faces between the angle bars 6 and are flanged over and fastened to the angle bars as shown so as to rigidly hold the side frames in rectan lar shape against distortional strains tending to shift the parts of the frame with relation to each other. Horizontal angle bars 10 extend across the lower ends ofthe vertical angle bars 6 and are similarly flangedE over and fastened to the vertical angle bars to form a rigid joint therewith. These bars 1U as well as the bars 9 at the top are drawn together by the bolts 7 similar to the tie bolts 7. The transformer frame F is thus composed of a pair of subframes of bars 6, 9, 10 at the front and back drawn together by the bolts 7, 7.

The edges of the angle bars 6, 10 overhang the core so as to be engaged by the bolts 7, 7 g their flat surfaces are pressed tightly against the core to grip the laminae together andtheir flanges 6, 10 extend outward. rThe lower angle bars 10 are extended beyond the sides lof the frame and are fastened by brackets 12 tothe spacer ring or bumper 13 which is adapted to t within the transformer tank to position the transformer therein. Arms 15 extending centrally from the bars 10 to the ring 13 may also be provided for additional support.

The upper ends of angle bars 6 are eX- tended above the core R and carry a superstructure S for the attachment of the transformer leads and bolts supporting the transformer tank cover and any auxiliary superstructure required for the attachment of the leads. In the specific embodiment shown this superstructure comprises a pair of chan-- nels 17 fastened between the front and back bars 6 at each side by brackets 18. Bolts 2O extend upward from these channels and at their upper ends carry the transformer tank cover. Intermediate` their ends the bolts 20 carry supports 21 for frame work 22 and insulators 23 for spacing and attachthe frame work 28 and insulators 26 for the posing any stresses on the core or coils. The entire superstructure is thus independently sustained and the bolts 2O may also be used to clam the frame in place in the transformer tanl; by bringing a downward pressure to bear on the bolts pressing the frame tightly down on the transformer tank bottom.

All parts of the transformerl frame of this invention are of metal stock cut to desired length and suitably drilled and fastened. The channels 6, 10, 17 are simply cut and drilled, the bars 9 c'ut and bent. ,p The bolts 20 are of standard stock fastened in place by nuts and the arms and bottom rings 13 are strips bent to shape. The parts are easily disassembled by loosening the corresponding bolts and the sections may be relatively shifted to fit accurately the core surface. Such frames can also be varied in dimensions by Varying the lengths of the cut parts and thus a variety of structures may be made without special patterns and casting. This effects a great saving in cost of manufacturev particularly since these large oil cooled transformers usually Vary in dimensions with each particular installation so that they are not carried in stock but must be built up to order.

This application is a continuation in part of my copending application Serial No. 331,325, filed October 17, 1919, patented July 4, 1922, Patent No. 1,421,899.

I claim: l

1. 1n a transformer, the combination of a laminated core formed of inner and outer layers and connecting portions, two side frames each consisting of angle pieces, one side of each piece' extending outward from the lamin and at an angle thereto and the other side lying flat against and parallel to the laminae and overhanging the outer edges thereof, and a series of bolts around said core connecting the overhanging edges of said side frames and acting to clamp the frames together against the laminae.

2. In a transformer, the combination of a laminated core formed of inner and outer layers and connecting portions, two4 side frames of rectangular form each consisting of two side and twofend angle pieces, one side of each piece extending outward from the laminac and at an angle thereto and the other side lying flat against and parallel to the laminas and overhanging the outer edges thereof, and a series of bolts around said core connecting the overhanging edges of said side frames and acting to clamp the frames together against the laminas.

3. In a transformer having a containing tank and cover therefor the combination with a transformer core made up of a plurality of laminas, supporting means comprising generally rectangular upright frames and means to clamp the core between said frames, cross pieces supported by the upper ends of said frames, rods supported by said cross pieces and extending upwardly therefrom to the transformer tank cover, and insulator supports adjustably mounted on said ro s.

4. In a transformer the combination of a core made up of a plurality of laminae, side frames between which the lamina: are clamped, each comprising two upright angle pieces one side of each of which extends outward and the other side of which lies flat against the laminae and overhangs the outer edge of the core, and end pieces connecting the uprights, bolts extending between the over-hanging edges of the upright members outside the core for clamping the laminas between the frames, cross pieces connecting the upper portions of the upright angles, rods supported by the cross pieces and extending upward therefrom, and insulator supports adjustably mounted upon the rods.

` ROBE-RT V. BINGAY. 

